<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div>
        <!-- 按钮 -->
        <!-- disabled='true' -->
        <button id="btn">这是一个按钮</button>
    </div>
</body>
<script>
    let btn = document.getElementById("btn");
    btn.setAttribute("disabled", true);
    // btn.enable = false;
</script>

</html>